Ad hoc query running crazy slow. -- sql server clients

DARR
1/16/2007 4:09:45 PM

Hi,
I have a job that execute a stored proc. It was running fine like 3
minutes to finish but a week ago it started to take 4 hours. Its using
ad hoc quries in that stored procedure. I reindex all the tables that
it was using. I check execution plan there was no tabloe scans. I
recompile the stored proc but no use. its sql 2000 with service pack 3
installed on it. Here is the query anyone has any clue what went wrong
suddenly. Link server is working fine.

i am running it like this

exec usp_MO_ActivityTradesBPS 'CORP'

CREATE PROCEDURE dbo.usp_MO_PositionsBPS

@Load varchar(25) = null,
@AsOfDate datetime

AS

Set @Load = '%'

If @Load is null or @Load = ''

begin

Set @Load = '%'

end

If IsNull(@AsOfDate,'') = ''
Set @AsOfDate = dbo.fn_BusinessDate(GetDate()-1)

If @Load = 'SANFRAN'

begin

Set @Load = '%'

SELECT RTRIM(T.BRANCHCD) + '-' + RTRIM(T.ACCOUNTNR) + '-' +
T.ACCOUNTTYPECD + T.CUSIPNR [key],
RTRIM(T.BRANCHCD) + '-' + RTRIM(T.ACCOUNTNR) + '-' + T.ACCOUNTTYPECD
BRANCHCD, T.TICKERSYMBOL, T.ADPSECURITYNR, T.CUSIPNR,
T.ADPSECURITY1DS, T.TDQUANTITY, T.SECURITYPRICEAM, T.LEDGERBALANCEAM,
T.TDDIVINTAM, T.TDGRCREDITMTDOP7,
T.TDMTDSECFEE, T.MTDREALPLTDOP7, T.TDCUMPL, T.MTDPL, T.MTDNETPL,
T.DAILYNETPL, T.CURRENCYISOCD
FROM BPS_Positions T
WHERE T.BRANCHCD = '001'
and T.BRANCHCD + '-' + T.ACCOUNTNR not in (Select Distinct
SM.Bps_AcctNr
From MO_InvStrategyMap SM
Where SM.Bps_AcctNr is not null)
and (T.TDMTDSECFEE <> 0
or T.TDCOmsnAm <> 0
or T.TDQUANTITY <> 0
or T.MarketValAm <> 0
or T.MTDNETPL <> 0
or T.MTDPL <> 0
or T.LEDGERBAlanceAm <> 0
or T.DAILYNETPL <> 0
or T.TDDivIntAm <> 0
or T.TDGRCREDITMTDOP7 <> 0)
ORDER BY T.BRANCHCD, T.ACCOUNTNR, T.ACCOUNTTYPECD, T.ADPSECURITYNR,
T.CUSIPNR, T.CURRENCYISOCD

end

Else

begin

SELECT AM.Inventory + T.CUSIPNR [Key], rtrim(T.BRANCHCD) + '-' +
rtrim(T.ACCOUNTNR) BRANCHCD, T.TICKERSYMBOL, T.ADPSECURITYNR,
T.CUSIPNR,
T.ADPSECURITY1DS, T.TDQUANTITY, case when T.TDQuantity <> 0
then T.MarketValAm/T.TDQuantity
else T.SecurityPriceAm end as SecurityPriceAm,
T.LEDGERBALANCEAM, T.TDDIVINTAM, T.TDGRCREDITMTDOP7,
T.TDMTDSECFEE, T.MTDREALPLTDOP7, T.TDCUMPL, T.MTDPL, T.MTDNETPL,
T.DAILYNETPL, T.CURRENCYISOCD
FROM BPS_PositionsHistorical T
JOIN MO_InvAccountMap AM
ON T.BRANCHCD + '-' + T.ACCOUNTNR = AM.AccountNr
JOIN (Select Distinct TraderCd
From MO_InvStrategyMap
Where PrimaryRecFl = 1
and (Desk like @Load
or Category like @Load
or SubCategory like @Load
or TraderName like @Load
or TraderCd like @Load)) SM
ON SM.TraderCd = AM.Inventory
WHERE T.BusinessDate = @AsOfDate
and AM.DataSource like 'BPS%'
and (T.TDMTDSECFEE <> 0
or T.TDCOmsnAm <> 0
or T.TDQUANTITY <> 0
or T.MarketValAm <> 0
or T.MTDNETPL <> 0
or T.MTDPL <> 0
or T.LEDGERBAlanceAm <> 0
or T.DAILYNETPL <> 0
or T.TDDivIntAm <> 0
or T.TDGRCREDITMTDOP7 <> 0)
ORDER BY AM.Inventory, T.BRANCHCD, T.ACCOUNTNR, T.ACCOUNTTYPECD,
T.ADPSECURITYNR, T.CUSIPNR, T.CURRENCYISOCD

end
GO

Joe Yong
1/23/2007 12:52:40 PM

Assuming this is consistently reproduced, a few things you might want to
investigate:
- Do you have the original (3-minute) query plan? If so, what's different
from the current one?
- Looking at the query plan, where are you spending most of your time?
- During execution, are you seeing any resource constraints? E.g. > 5 avg
disk queue length, high avg disk sec/read,
- Are you seeing waits on cxpackets when you run dbcc sqlperf (waitstats)?
Might indicate parallellized queries waiting.

Suggest you dig into the query plan to see where it's spending most of its
time and check to ensure you don't have resource bottlenecks.

joe.

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sql server clients : Ad hoc query running crazy slow.